Medium-Voltage Potential Transformer | Elevate Power Distribution: Explore Premium Voltage Transformers | CIC

12/24 kV Epoxy-Cast Voltage Transformer (Potential Transformer), Power Source for Circuit Breaker Operation and Lighting (Model: EPF-20DZ) / Serving a diverse client base around the world, CIC is a leading manufacturer and supplier of current transformers, potential transformers (voltage transformers), distribution transformers, epoxy insulators, electronic meters, and other electrical and electronic products.

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12 kV & 24 kV Epoxy-Cast Voltage Transformer (Potential Transformer) or Control Power Transformer, as Power Source for Circuit Breaker Operation and Lighting | Enhance Safety and Performance with Superior Epoxy Insulators | CIC

Based in Taiwan since 1974, CHALLENGE INDUSTRIAL CO., LTD. specializes in manufacturing high-quality electrical products, including 12 kV & 24 kV Epoxy-Cast Voltage Transformer (Potential Transformer) or Control Power Transformer, as Power Source for Circuit Breaker Operation and Lighting, current transformers, voltage transformers, distribution transformers, epoxy insulators, and power capacitors. With over 45 years of expertise and technology collaboration with Germany's MWB, CIC is ISO certified and offers products recognized for reliability in various industrial applications.

Challenge Industrial Co., Ltd. (CIC) stands at the forefront of electrical innovation, specializing in the manufacturing of current transformers, voltage transformers, distribution transformers, epoxy insulators, and power capacitors. With a legacy built on over 45 years of engineering excellence and leveraging advanced German technology, CIC commits to delivering high-quality, ISO-certified electrical solutions. Their comprehensive product range, paired with an ISO-certified approach and a TAF-accredited laboratory, ensures reliability and performance for a diverse global market. CIC is your go-to source for electrical components that power progress and efficiency.

CIC has been offering customers high-capacity power capacitors since 1974, both with advanced technology and 50 years of experiences, CIC ensures each customer's demands are met.


12 kV & 24 kV Epoxy-Cast Voltage Transformer (Potential Transformer) or Control Power Transformer, as Power Source for Circuit Breaker Operation and Lighting

EPF-20DZ

This voltage transformer, cast with self-extinguishing epoxy resin, is a medium-voltage, indoor-type, single-phase potential transformer for a 12kV or 24kV power system for measuring and monitoring voltage signals. With a continuous output capacity of 4000 VA (max.), it can also serve in a small substation or a switchgear panel as a power source for circuit breaker operation and lighting equipment*.

* Power source for circuit breaker operation and lighting equipment: In this application, the voltage transformer can also be referred to as a "control power transformer" (CPT), "control transformer" (CTR), "industrial control transformer," or a "machine tool transformer."

Medium-Voltage Potential Transformer

About the Product

Single-phase indoor-use voltage transformer (potential transformer) EPF-20DZ, intended for a 12 or 24 kV power system, is designed for the measuring and monitoring of the voltage signal.

Due to its continuous output capacity of 4000VA (max.), this voltage transformer can be used in a small substation or a switchgear panel as a power source for circuit breaker operation and lighting equipment. This setup helps to conserve space and reduce cost.

In addition, the EPF-20DZ voltage transformer can be connected to one or two smaller-capacity voltage transformers to form a three-phase voltage transformer (3ϕ VT). This can be done via a V-V or Y-Y connection.

Cast in self-extinguishing Araldite® epoxy resin, the EPF-20DZ voltage transformer is characterized by superior insulation and excellent safety.

Product Features

  • Standard: IEC or IEEE*
  • System Voltage: 12 or 24 kV
  • Frequency: 50 or 60 Hz
  • Power source for circuit breaker operation and lighting
  • Option: Forming a three-phase VT (PT) through connection with one or two smaller-capacity voltage transformers (via a V-V or Y-Y connection)
  • No risk of oil leakage
  • Self-extinguishing
  • Includes a fuse on the secondary side

Selection Table

Model

Primary
Voltage
(kV)
Secondary Voltage
(V)

Burden / Accuracy

AC / BIL
(kV)

Thermal Burden
(VA)

Creepage
(mm)

EPF-20DZ

22 or 11

110

500VA/0.5CL
200VA/0.3CL

50/125

4000

531

22

220-110**

4000-2000

* Other standards and specifications available. 
** This specification comes with an added tap in the secondary winding so as to offer two voltage ratios (22-11 kV).

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